[PATCH] treemanifest: fix bad argument order to treemanifestctx

[Martin von Zweigbergk]

# HG changeset patch
# User Martin von Zweigbergk <martinvonz at google.com>
# Date 1476745932 25200
#      Mon Oct 17 16:12:12 2016 -0700
# Node ID b36a81cd4015b9742d1fbb0d5f94207e7a400cdb
# Parent  8a864844d5a0c34bdb24d2e098a0cd339e32e020
treemanifest: fix bad argument order to treemanifestctx

Found by running tests with _treeinmem (both of them) modified to be
True.

diff -r 8a864844d5a0 -r b36a81cd4015 mercurial/manifest.py
--- a/mercurial/manifest.py	Wed Oct 12 21:33:45 2016 +0200
+++ b/mercurial/manifest.py	Mon Oct 17 16:12:12 2016 -0700
@@ -1386,7 +1386,7 @@
         # Need to perform a slow delta
         revlog = self._revlog
         r0 = revlog.deltaparent(revlog.rev(self._node))
-        m0 = treemanifestctx(revlog, revlog.node(r0), dir=self._dir).read()
+        m0 = treemanifestctx(revlog, self._dir, revlog.node(r0)).read()
         m1 = self.read()
         md = treemanifest(dir=self._dir)
         for f, ((n0, fl0), (n1, fl1)) in m0.diff(m1).iteritems():